Rotating bowl pump



.July.26, 1938. H. FOTTINGER ROTATING BOWL PUMP Filed July 5, 1934 2Sheets-Sheet 1 It? t y wh m 3% n5 1 6T. n A \w H "MW 1 H y 1938. H.FOTTINGER 2,124,914

ROTATING BOWL PUMP Filed July 5, 1934 2 Sheets-Sheet 2 Hermann B'ZL'nyer p nay:

Patented July 26, 1938 UNITED STATES ROTATING BOWL PUMIP HermannFiittinger, Berlin-Wilmersdorf, Germany Application July 5, 1934, SerialNo. 733,930 In Germany July 7, 1933 3 Claims.

The present invention relates to a pump for scooping liquids fromrotating liquid rings. The pump according to the present inventioncomprises a swingable scooping pipe having a hydroplane surface whichhas a curved portion becoming tangent to the top of the entry end ofsaid pipe, whereby the surface will glide on the liquid ring.

Pumps for scooping liquids from rotating liquid rings are already known,but the scooping pipe of the known construction is not swingably mountedand does not include an equivalent of a hydroplane surface whereby thepipe will glide on the fluid ring.

A further object of the present invention is that lateral surfaces areprovided one on each side of the pipe to keep down the wave action onthe liquid ring when the pipe dips into the ring.

A still further object of the invention is to provide an air containerconnected to the scooping pipe to receive any entrapped air from theliquid scooped by the pipe.

Fig. 1 is a partial section through a device with a working spacecorresponding to a type of pump.

Fig. 2 shows a side elevation thereof partly in section on line II-II ofFig. 1, as seen from the right.

Fig. 3 is a partial section of scooping device provided with a diifuser.

Fig. 4 is a section on line IV-IV of Fig. 3.

Figs. 5 and 6 are vertical and horizontal sectional views of an airseparation device.

Figs. 7 and 8 are side views showing accumulators with vertical axes.

Figs. 9 and 10 are sectional views of suitable feeding or pumpingdevices, taken at right angles to the axes thereof.

Fig. 11 is a section through the accumulator itself with a built-inguide device and a side ele- 40 vation of the motor.

Fig. 12 shows a sectional view of an accumulator with a plurality ofsingle tanks and delivery means.

Fig. 13 is a partial sectional view of thescoop- 45 ing device ofFigs. 2and 3 but provided with a power control for engagement and disengagementwhich may be automatic.

In Fig. l the shaft of the motor I carries the rotating poweraccumulator 2 with the pumping device 3, the supply pipe the deliverypipe 5 and the scooping device 6, pipes 4 and 5 being mounted on thestationary standard 1. By the lever 8 the said scooping device can berocked together with its pipe 5. From this delivery pipe 5 55 the liquidflows through the stationary pipe l0 into the working cylinder l2 whereit raises th piston I3 for accomplishing its work for any of thepurposes stated.

When the control valve l l is reversed manually or by any automaticmechanism by means of the control rod 19 and the lever l4, l5 for thedischarge of the working cylinder 12 and when more over, by lever l4, l6and link ll, the scooping device 6 is withdrawn from the power storagewater ring, the piston l3 will, by its own weight or under the pressureof a spring or compressed air,

force back the liquid through the supply pipe 4,

and in this form of the device through a throttling device l8interposed, into the pumping device 3 and thus into the accumulator.

The throttling device is provided in order that the motor may not beoverloaded when the liquid flows back from l2 into 3 intermittently.

The excess of the liquid forced away by the piston 13 as compared withthe amount of liquid allowed by the throttling device l8 to pass intothe accumulator 2 then temporarily finds its place in the compensatingchamber 20 until it is also permitted to pass into the accumulatorthrough 18. The compensating chamber 20 may also be charged by athree-way cook 9 with compressed air or the like.

In Fig. 2 the scooping tube 6 is designed according to the invention asa slightly tapered diffuser; the position shown by .dotted lines beingthat existent after a partial discharge of the accumulator. For definitepurposes the lever B of the scooping device may be provided with acounterweight 2| or another suitable element, such as spring 5'1 (Fig.13), pressure piston 58 or the like, which withdraws the scooping tube 6dependent upon a definite degree of discharge of the accumulator,preferably automatically, from the liquid so as to render it absolutelyfree from resistance, whereby practically the no-load losses are reducedto nil.

Figs. 3 and 4 show an improved scooping device by way of example. At theorifice of the said device '5 the relative flow exerts a verysubstantial dynamic pressure which tends to press the scooping devicebelow the level of the liquid. gin order however, that this may beprevented beyond a definite degree, device 6 is e. g. provided with ahydro-plane-like surface 23 on which the flow exerts a contrary torque.The development of waves may be diminished by the scooper 6, 23 beingprovided with lateral surfaces 24, which may be perforated if desired,or similar means which e. g. damp the waves by perforated-mines,permeable strainers or the like. Also the ac- .cumulator tank itself maybe provided with this type of permeable surfaces 21 (Figs. 1 and 11).

The air which may be carried along into the scooper can be separated outprior to its antrance into the working chamber according to Figs. 5 and6 by means of an air vessel 25, preferably centrifugally (production ofa circulation) towards the center line and either discharged bydischarging means 26 or utilized as com pressed air forany usefulpurpose.

According to Figs. 7 and 8 the center line of the accumulator 2 may alsobe disposed vertically either above or below the motor I.

A particularly important part of the present accumulator is the feedingdevice or pump 3 for the liquid. According to the invention it isintended for supplying the liquid, for the reason already stated, as faras possible only with the kinetic energy existing in the accumulator,and with the maximum efficiency. Suitable designs are shown in Figs. 9and 10, in which 4 is the feeding device and 3 the pumping device, thelatter being represented in Fig. 9 as a plain action pump and in Fig. 10as a reaction pump, but in either instance with free discharge into theatmosphere and forward outflow in the direction of revolution of thecurved arrow. In order that the liquid supplied may be brought into theliquid ring as free as possible from impact and loss, stationary guidedevices 28 may be provided according to the present invention which maybe fastened to the supply pipe 4 by means of the disc 29 or the like. Inthis instance pipe 4 coaxially encloses theaccumulator shaft 30. Theextension of the supply pipe.4 and of the discharge pipe 5 pass throughthe stationary cover 32 which latter seals the aperture of the rotatingaccumulator by'means of a labyrinth packing ring 33.

According to Fig. 12 also a plurality of dynamic storage tanks may beadvantageously disposed within one another. main accumulator 2a may beused for producing large working forces in certain devices or machines(Fig. 1) while the interior storage tank 2b is to be used for theactuation of small working cylinders or other devices but chiefly forcontrolling and switching purposes. Accordingly there are available twoscooping devices 6a and 6b and two discharge pipes 5a and 5b. The

supply device 4a may at first advantageously supply the interior tank 2bentirely or partially, so that the same is always kept filled, as forcontrolling purposes.

In many cases of use it is desirable to avoid losses of the liquid asresulting from splashing, leakage, etc. To this end the accumulator maybe enclosed, as shown in the top half of Fig. 12, by a casing 35provided with a peripheral groove 36 in which 'eventhe smallest amountof leakage liquid is collected. According to the present invention thelatter is projected or pumped off along this groove towards any suitablepoint, e. g. a collector 31a placed at a higher level, by smallblade-like projections 31 of the rotating tank or simply by the frictionof the roughened surface thereof.

In order that .a decrease of speed, as resulting from a sudden supply oflarge amounts of liquid stored, may be restricted as much as possible,an ordinary flywheel 38 can be directly connected, according to Fig. 12,with the shell of the storage tank 2a.

The-dynamic storage tank can also be ad- For instance the outsidevantageously used for damping angular vibrations of combustion engines.

When the accumulator. is stopped the liquid ring collapses. If the depthof the water is sufficiently small, the whole amount of liquid will findits place in the bottom half of the tank. In case the quantities storedare larger,-a part of the liquid may, according to the invention, bebrought into otherwise revoluble spaces such as 2 (Fig. 1) and a part ofit in always stationary spaces 20 of the entire set/ This is always thecase e. g. when the working space (as l2 in Fig. 1) is partly orentirely at a lower level than the center of the accumulator;Preferably, however, a stationary separate container 31a (Fig. 12) maybe disposed outside the accumulator.

In Fig. 13 the scooping device 6 shown in Figs. 2 and 3 has beencombined with a power control for automatic engaging and disengaging. Asalready described, the orifice of 6 is by the relative flow subjected toa very high dynamic pressure which tends to press the scooping devicbelow the levelof the liquid. The hydroplane-like surface 23 preventsthis beyond a definite extent. The orifice of the scooping device willtherefore always follow the level of the liquid of the revolving storagetank. When now the latter has been emptied, the pressure ceases to acton the orifice of the scooping device and the latter will be drawn bythe spring 51 into the position marked by dotted lines in Fig. 13. Thescooping device is provided with a rotary slide valve 54 so designedthat during operation the liquid is allowed to flow freely through thedischarge apertures 55 into the discharge pipe 56. When inoperative(viz. in the position shown by dotted lines) the rotary slide valve 54closes the vdischarge apertures 55 so that the pressure liquid is notallowed to return into the scooping device 6 from the working spacethereto connected.

The rotary slide valve 54 is provided with a rotary piston .58 which isadapted to move within a pocket 62. Whenit is intended to again placethe scooping device 6 into service after the storage tank having beenfilled anew, the bottom 'half of the pocket 62 is intentionally placedunder pressure by the connecting pipe 59 by means of a control member sothat the rotary slide valve together with .the scooping device 6 canturn counter-clockwise until the orifice of the device 6 has beenimmersed in the rotating liquid ring. 6| is an opening intended for theremoval of air or leakage water from the pocket 62 when the rotary slidevalve is actuated.

I'claim:

1. A pump for scooping liquids from rotating liquid rings comprising aswingable scooping pipe having a hydroplane surface having a curvedportion becoming tangent to the top of the entry end of said pipewhereby the surface will glide on the liquid ring.

2; A pump for scooping liquids from rotating liquid rings comprising aswingable scooping pipe having a hydroplane surface at the top of theentry end thereof whereby the surface will glide .on the liquid ring,and lateral surfaces one on

